The H501R is a high performance and versatile right angle flashlight with a bright Cree XLamp red color LED. The H501R can also be used as a headlamp with a supplied headband. Six modes, including two flashing modes, can be easily selected with a soft touch pushbutton switch. Low level outputs are perfect for preserving night vision including astronomical map and data readings. 1Hz and 4Hz flashing frequencies from British standard for cycle rear lights are used.